AMERICAN COLEOPTERA. 311 



the femoral articulation only. Abdomen with seven distinct segments (at least 

 in the male). Elytra distinctly margined at the sides, epipleiirse distinct. 

 Legs slender not long, tibiae not spinulose and without terminal spurs. Tarsi 

 slender, four-jointed, first three joints subequal, very gradually decreasing 

 in length, last joint very nearly as long as these together. Body winged, 

 feebly contractile. 



This genus seems fully to unite, through Aglyptus, the Anisotomini 

 with the present tribe. By its feeble contractile power and entire 

 nietasternum it differs strikingly from Clanibus and Calyptomerus, 

 and the structure of its maxillary palpi, antennae, mesosternum and 

 posterior coxae define it as one of the most distinct genera in the 

 entire family. 



One species occurs in our fauna. 



E. brunnipennis Mann. — Oblong-oval, moderately convex, feebly con- 

 tractile, sparsely clothed with extremely fine pubescence, piceous, head and 

 thorax rufous. Head sparsely minutely punctulate. Thorax about twice as 

 wide as long, narrowed in front, apex broadly eraarginate, sides feebly arcuate, 

 base broadly arcuate, hind angles distinct but obtuse, surface very minutely 

 punctulate. Elytra oval, gradually narrowed posteriorly, base on each side 

 slightly oblique, humeri obtuse, sides feebly arcuate, apex slightly obliquely 

 truncate, surface very minutely sparsely punctulate. Body beneath and legs 

 rufo-piceous, surface very sparsely punctulate. Length extended .08 inch; 

 2 mm. (PI. VII, fig. 16). 



The male has the anterior tarsi distinctly broader than the female. 



This insect has much more general resemblance to a non-contractile 

 Agathidium than to Clambus. 



Occurs in Alaska. 



CLAMBUS Fischer. 

 Head large, broad, rather flat, angulate at the sides and acutely margined, 

 gradually narrowed behind, front oval, at sides before the eyes notched allow- 

 ing the antennae to pass beneath the head to an oblique antennal groove which 

 is limited within by a raised line. Clypeus not distinct. Eyes rather large 

 but flattened above and angulate, beneath rather coarsely granulated. Antennae 

 ciliate, nine-jointed, inserted free at the anterior margin of the eyes, first joint 

 short, stout, oval, second slender and long, third and fourth slender, shorter 

 than the second, 5 — 7 short, gradually a little broader, 8 — 9 forming an oval 

 club, the terminal larger. Labrum short, scarcely visible beyond the clypeus. 

 Mandibles short, bifid at tip. Maxillary palpi with first joint very small, 

 second and third stouter, subequal, terminal slender and acute at tip, as long as 

 the two preceding united. Anterior coxae conical, transverse, contiguous with 

 distinct trochantin, the cavities angulate externally and closed behind, pro- 

 aternura in front very narrow. Mesosternum very short, carinate between the 

 coxse which are very transverse. Metasternum moderately long, suddenly 

 concave in front, the concavity limited by an arcuate edge. Posterior coxae 

 laminate covering the hind thighs completely in repose, the plates arcuately 

 narrowed within. Abdomen with five visible segments only. Legs slender 

 not long, the tibiae not spinulose and without terminal spurs. Tarsi slender 



